TOEFL Reading: ETS-TOEFL阅读机经 - X676074Q1A5544D4L$

Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. In consideration of the extreme cold, decomposition of complex organic molecules in the interstellar environment is astonishing. B. Extremely cold temperatures prevent organic molecules from decomposing, making organic chemistry possible in the interstellar environment. C. Although the extreme cold makes complex organic molecules exist, organic chemistry rarely occurs in the interstellar environment. D. Since one would expect the extreme cold to prevent the formation of complex organic molecules, organic chemistry in the interstellar environment is not understandable.